1.
|
|
2.
|
Champaign, Ill. : Dept. of Natural Resources, Illinois State Geological Survey, 1995.
|
3.
|
Champaign, Ill. : Dept. of Energy and Natural Resources, Illinois State Geological Survey, [1994].
|
4.
|
Springfield, Ill., Illinois Mining Institute.
|
5.
|
Urbana : Illinois State Geological Survey, 1962.
|
6.
|
Urbana, Illinois State Geological Survey, 1963.
QE105 .A45 no. 342, etc. |
Map It |
|
7.
|
Urbana, [Springfield, Schnepp & Barnes, printers] 1925.
|
8.
|
Urbana : Illinois State Geological Survey, 1963.
|
9.
|
Urbana, IL : Illinois State Geological Survey, 1955.
|
10.
|
Urbana : Illinois State Geological Survey, 1962.
|